AntiTopQuark commented on code in PR #2277:
URL: https://github.com/apache/kvrocks/pull/2277#discussion_r1582194527
##########
src/storage/rdb.cc:
##########
@@ -1005,3 +1000,35 @@ Status RDB::rdbSaveBinaryDoubleValue(double val) {
memrev64ifbe(&val);
return stream_->Write((const char *)(&val), sizeof(val));
}
+
+Status RDB::rdbSaveZipListObject(const std::string &elem) {
+ // calc total ziplist size
+ uint prevlen = 0;
+ const size_t ziplist_size = zlHeaderSize + zlEndSize + elem.length() +
+ ZipList::ZipStorePrevEntryLength(nullptr,
prevlen) +
+ ZipList::ZipStoreEntryEncoding(nullptr,
elem.length());
+ auto zl = std::make_unique<unsigned char[]>(ziplist_size);
Review Comment:
thank you very much, done
##########
src/storage/rdb_ziplist.cc:
##########
@@ -152,3 +148,65 @@ Status ZipList::peekOK(size_t n) {
}
uint32_t ZipList::getEncodedLengthSize(uint32_t len) { return len <
ZipListBigLen ? 1 : 5; }
+
+uint32_t ZipList::ZipStorePrevEntryLengthLarge(unsigned char *p, unsigned int
len) {
+ uint32_t u32 = 0;
+ if (p != nullptr) {
+ p[0] = ZipListBigLen;
+ u32 = len;
+ memcpy(p + 1, &u32, sizeof(u32));
+ memrev32ifbe(p + 1);
+ }
+ return 1 + sizeof(uint32_t);
+}
+
+uint32_t ZipList::ZipStorePrevEntryLength(unsigned char *p, unsigned int len) {
+ if (p == nullptr) {
+ return (len < ZipListBigLen) ? 1 : sizeof(uint32_t) + 1;
+ } else {
+ if (len < ZipListBigLen) {
+ p[0] = len;
+ return 1;
+ } else {
+ return ZipStorePrevEntryLengthLarge(p, len);
+ }
+ }
+}
Review Comment:
done
##########
src/storage/rdb_ziplist.h:
##########
@@ -41,4 +53,4 @@ class ZipList {
Status peekOK(size_t n);
void setPreEntryLen(uint32_t len) { pre_entry_len_ = len; }
static uint32_t getEncodedLengthSize(uint32_t len);
-};
+};
Review Comment:
done
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